Practice Quiz

MCAS Science, Technology/Engineering Practice - Question List

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6. An automobile battery produces which type of current?
  1. alternating current
  2. digital current
  3. direct current
  4. interval current
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7. Audio signals in MP3 players are stored in digital form. In order for these signals to be heard through headphones or speakers, the digitally stored data is converted by which of the following components?
  1. a digital to data converter
  2. a digital to video converter
  3. a digital to analog converter
  4. a digital to optical converter
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8. It is not advisable to seek shelter under a highway overpass during a tornado. When air moves through this narrow area, wind speeds increase and pressure decreases. This increases the risk for injuries. This phenomenon can be explained by which of the following?
  1. Bernoulli’s principle
  2. gravitational force
  3. R-values
  4. shear
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9. Which of the following statements describes the major difference between a closed fluid system and an open fluid system?
  1. A closed fluid system uses a gas and an open fluid system uses a liquid.
  2. A closed fluid system uses a liquid and an open fluid system uses a gas.
  3. A closed fluid system does not retain all its fluids and an open fluid system does.
  4. A closed fluid system retains all its fluids and an open fluid system does not.
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